Results 81 to 90 of about 545,751 (316)

Projective differential geometry of space curves [PDF]

open access: yes, 2016
Thesis (M.A.)--University of Kansas, Mathematics ...
Senor, Muriel Elizabeth
core  

Rationality in Differential Algebraic Geometry [PDF]

open access: yesarXiv, 2014
Parametric Cartan theory of exterior differential systems, and explicit cohomology of projective manifolds reveal united rationality features of differential algebraic geometry.
arxiv  

Projective and Carrollian geometry at time/space-like infinity on projectively compact Ricci flat Einstein manifolds [PDF]

open access: yesGeometriae Dedicata (2025) 219:12
In this article we discuss how to construct canonical \emph{strong} Carrollian geometries at time/space like infinity of projectively compact Ricci flat Einstein manifolds $(M,g)$ and discuss the links between the underlying projective structure of the metric $g$.
arxiv   +1 more source

Differentiable mapping of affine Q[m] and projective P[n] spaces (m>n)

open access: yesИзвестия Томского политехнического университета: Инжиниринг георесурсов, 2019
The urgency of work is caused by necessity of detailed studying of differentiable mappings of multivariate space. The main aim of the research is to study differentiable mappings of V[m, n] of affine space Q[m] to projective space P[n] (m>n); to consider
Evgeniy Ivlev   +2 more
doaj   +2 more sources

Five‐year evaluation of linear accelerator‐based SRS platform isocentricity

open access: yesJournal of Applied Clinical Medical Physics, EarlyView.
Abstract Linear accelerator (LINAC)‐based stereotactic radiosurgery (SRS) has become a mainstay in the management of intracranial tumors. However, the high fractional doses and sharp gradients used in SRS place heavy demands on geometric accuracy.
Yohan A. Walter   +3 more
wiley   +1 more source

Invariants in c U p-Geometry [PDF]

open access: yesarXiv, 1997
This note describes the construction of c U p-invariant differential operators on statistical manifolds, i.e. of operators canonically associated to a geometry which synthetizes the properties of conformal and projective geometries.
arxiv  

Machine learning based radiomics model to predict radiotherapy induced cardiotoxicity in breast cancer

open access: yesJournal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Cardiotoxicity is one of the major concerns in breast cancer treatment, significantly affecting patient outcomes. To improve the likelihood of favorable outcomes for breast cancer survivors, it is essential to carefully balance the potential advantages of treatment methods with the risks of harm to healthy tissues, including the heart.
Amin Talebi   +6 more
wiley   +1 more source

Projective invariants of CR-hypersurfaces [PDF]

open access: yesarXiv, 2010
We study the equivalence problem under projective transformation for CR-hypersurfaces of complex projective space. A complete set of projective differential invariants for analytic hypersurfaces is given. The self-dual strongly C-linearly convex hypersurfaces are characterized.
arxiv  

AAPM‐RSS Medical Physics Practice Guideline 9.b: SRS‐SBRT

open access: yesJournal of Applied Clinical Medical Physics, EarlyView.
Abstract The purpose of this Medical Physics Practice Guideline (MPPG) is to describe the minimum level of medical physics support deemed prudent for the practice of linear‐accelerator, photon‐based (linac) stereotactic radiosurgery (SRS), and stereotactic body radiation therapy (SBRT) services.
Eileen Cirino   +9 more
wiley   +1 more source

Evaluation of OPTOS wide‐field fundus image projections for radiotherapy planning of uveal melanoma

open access: yesJournal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose To investigate the relationship between the stereographic and azimuthal equidistant projection (AEP) of the human retina for radiotherapy planning with OPTOS optomap wide‐field fundus images (Optos, UK). Further, the geometric accuracy of an OPTOS fundus image is quantified.
Jörg Wulff   +7 more
wiley   +1 more source

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